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' Patented Ian. 3|,- I899.-

J. RHINO,

COFFEE MILL (Application filed June 15, 1898. (No Model.)

2 Sheets-Sheet l.

c oiaz 2750710,

N10. 6I8,523. Pat'er lted lan. 3|, I899.

-J. sumo.

COFFEE MILL.

(Application filed June 15. 1898.

No Model.) 2 Sheets8het 2.

'\ v g %E W e Egg cums PETER$ co. PHCITD-LITHO WASHINGTON, D, c.

NITED STATES PATENT FFICE.

JOHN RHINO, OF JACKSON, MONTANA, ASSIGNOR OF ONE-HALF TO B. O.

' FOURNIER, OF SAME PLACE.

COFFEE-MILL.

SPECIFICATION forming part of Letters Patent No. 618,523, dated January31 1899.

Application filed June 15,1898.

ToaZZ whom it may concern:

Be it known that I, JOHN RHINO, a citizen of the United States, residingat Jackson, in the county of Beaver Head and State of Montana, haveinvented a new and useful Coffee- Mill, of which the following is aspecification.

The invention relates to improvements in coffee-mills.

The object of the present invention is to improve the construction ofcoffee-mills and to provide a simple and comparatively inexpensive oneadapted to be readily operated and capable of ready adjustment to enablecofiee to be ground to the desired degree of fineness.

The invention consists in the constructionand novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the'claims hereto appended.

In the drawings, Figure 1 is a perspective View of a coffee-millconstructed in accordance with this invention. Fig. 2 is a centralvertical sectional view. Fig. 3 is a vertical sectional view taken atright angles to Fig. 2. Fig. 4 is a horizontal sectional view. Fig. 5 isa detail perspective view of the grindingcone or runner. Fig. 6 is adetail perspective view of the grinding-shell. Fig. 7 is a detailperspective view of the horizontal casing which houses the gearing. Fig.8 is a verti cal sectional view illustrating another form of operatingmechanism.

Like numerals of reference designate corresponding parts in all thefigures of the drawlngs.

1 designates a box provided in its top with a central circular openingand having at one side a drawer 2", arranged to receive the groundcoffee in the usual manner. Within the circular opening of the top ofthe boX is supported a rotary grinding-shell2, of truncoconical form,which is provided at its inner face with a grinding-surface 3 and whichcooperates with a grinding-cone or runner 4.

The grinding-shell 2 is supported upon a lower horizontal bar 5,connected with the top of the box by vertical rods 6 and spaced from thesaid top by sleeves 7, arranged on the lower portions of the rods 6 andinterposed between the upper face of the bar 5 Serial No. 683,514. (Nomodel.)

and the lower face of the top of the box.

The rods .6, which are provided at their lower ends with heads, passthrough the top of the box at opposite sides of the openingand havethreaded portions which receive nuts 8 and retain an upper horizontalbar 9 on them.

The grinding-cone 4, which is arranged within the outer shell 2, has alower grind ing-face at its sides, and its upper portion 10 is taperedand corrugated and adapted to force the material downward between thelower portion of the cone and the shell, besides serving to crush thecoffee. The said cone 4 is preferably formed integral with a verticalshaft or core 11, the lower portion of which depends from the bottom ofthe cone to form a journal 12, which is arranged in a central opening ofthe horizontal bar 5 and allows for the necessary vertical movement ofthe cone in adjusting the same to produce the desired degree offineness.

The core or shaft 11 is provided at the top of the cone'with a verticalcogwheel 13, which meshes with a pair of pinions 14, located at oppositesides of the vertical shaft -11 and meshing with a cog-rim 15 of theouter shell 2, the upper portion of the latter being reduced at itsinner face and provided with the teeth which form the cog-rim. Theintermediate pinions 14, which are located between the shell and thecone, reverse the movement of the shaft and cause the shell to rotate inthe opposite direction.

The pinions 14 are provided with integral hub extensions or journals 16,which are arranged in bearing-recesses 17 of a transverse casing 18,which is also provided with a central recess for the reception of thecog-wheel I 13. The bearingrecesses 17 are enlarged at the bottom of thecasing to receive the pinions 14, and the said casing forms a completehousing for the gearing, covering the top and sides thereof andpreventing the same from becoming clogged by the coffee. The said casingis provided with a central opening to receive the shaft 11. It has ears19 at its ends to receive the rods 6, and it is rounded at its top andsides between the ends, as shown, so as not to interfere with thedownward passage of the coffee.

The coffee to be ground is placed within a tapering hopper 20, which isprovided at opposite sides with recesses 21 to receive the ends of thecasing 18, and its lower edge is circuinferentially rabbeted at itsouter face to provide depending flanges 20 at opposite sides of therecesses 21 to form guards to prevent coffee from coming in contact withthe teeth of the outer shell 2, said guards being located opposite theteeth and fitting within the shell, as clearly illustrated in Fig. 3 ofthe accompanying drawings. The upper edge of the hopper is provided atopposite sides with notches 23, which receive the upper bar 9, and thelatter has corresponding notches 24: at its lower face for engaging thehopper. The horizontal bar 9 is provided with a central opening toreceive the shaft 11, and the nuts on the upper ends of the rods 6retain sections 25 of a lid or cover on the rods, whereby the saidsections 25 are hinged and are adapted to swing from over the hopper, asshown in Fig. l. The sections 25 of the lid or cover are provided atopposite ends with perforated ears 20, which receive the upper terminalsof the rods 6.

The upper portion of the shaft 11 is threaded at 27 and receives amilled nut 28, which is supported above the casing by a sleeve orthimble 29 and which is adapted to raise and lower the cone and vary thefineness of the grinding operation, so as to adjust the mill forgrinding coarse or fine cofiee. The adjusting-nut is provided at oneside of its opening with a notch 30, adapted to receive a key 31, whichengages one of a series of longitudinal grooves 32, whereby the nut isheld at any desired adjustment. The upper end of the shaft is threadedand is adapted to receive a cap or nut 33, which retains a crankhandle3i on a squared portion 35 of the shaft, the squared portion beinglocated directly beneath the threaded portion. Instead of employing acrank-handle for operating the coffee-mill a pinion 35 may be mountedupon the upper end of the shaft 11, as illustrated in Fig. 8 of theaccompanying drawings, and the said pinion 35 is adapted to mesh with asimilar bevel-pinion 36 of a horizontal shaft 37, journaled in asuitable bracket or support 38, which is provided witha depending stem39, adapted to take the place of one of the rods 6. squared and isadapted to receive a wheel 40, having a crank-handle 41, or an ordinarycrank-handle may be provided.

The invention has the following advantages: The coffee-mill, which issimple and comparatively inexpensive in construction, is easily operatedand may be readily adjusted to grind coffee either coarse or fine. Theadjusting mechanism is arranged within convenient reach, and thegearing, which reversely rotates the shell in the cone, is housed withinthe horizontal casing and is thereby prevented from becoming cloggedwith cofiee. The hopper fits within the upper portion of thegrinding-shell and forms opposite guards The outer end of the shaft 37is,

which prevent the coifee from coming in contact with the internal teethof the shell.

Changes in the form, proportion, and minor details of construction maybe resorted to without departing from the spirit or sacrificing any ofthe advantages of this invention.

That I claim is- 1. In a device of the class described, the combinationof a grinding-shell provided on its inner face with a grinding-surfaceand having interior cog-teeth, a hopper, a vertical shaft carrying agrinding-cone arranged within the shell and provided with agrindingsurface, a gear-wheel carried by the shaft, intermediate pinionsmeshing with the gearwheel and the teeth of the shell, a horizontalcasing extending across the shell and provided at its lower face withrecesses receiving and housing the gearing and extending across thelower portion of the hopper, and means for rotating the shaft,substantially as de scribed.

2. In a device of the class described, the combination of a lower rotarygrinding-shell provided with internal teeth, a grinding-cone arrangedwithin the shell, a vertical shaft carrying the cone, a horizontalcasing open at the bottom and closed at the top and sides and extendingacross the top of the shell, said casing receiving and housing thegearwheel,the intermediate pinions housed within the casing and meshingwith the gear-wheel and the shell, and a hopper mounted upon the shell,provided at opposite sides with reoesses to receive the casing andhaving depending guard-flanges located at opposite sides of the casingand arranged in front of the teeth of the shell, substantially asdescribed.

3. In a device of the class described, the combination with a box orsupport having an opening, of rods passing through the box or support atopposite sides of the opening and extending above and depending into thesame, a lower horizontal bar connecting the rods at the bottom thereofand provided with a central opening, sleeves disposed on the rods andinterposed between the lower connecting-bar and the box or support, avertical shaft having a grinding-cone and provided with a dependingportion or journal arranged in the opening of the lower connecting-bar,a grinding-shell receiving the cone and supported by the lowerconnecting-bar and arranged at its upper edge in the opening of the boxor support, a hopper located above the shell, and a top connecting-barsecured to the upper ends of the rods and extending across the top ofthe hopper, substantially as described.

4. In a device of the class described, the combination of a box orsupport having an opening, vertical rods passing through the box orsupport at opposite sides of the opening, a lower connecting-bar securedto the lower ends of the rods, a grinding-shell supported upon the lowerconnecting-rod, a hop per, a vertical shaft having a grinding-cone andprovided with a threaded upper portion, a horizontal casing, gearinghoused Within the casing and meshing with the shell and connecting thesame with the shaft, an upper connecting-bar secured to the rods andlocated above the hopper, andan adjustingnut arranged on the threadedportion of the shaft and interposed between the upper connecting-bar andthe casing, substantially as described.

5. In a device of the class described, the combination of a box orsupport having an opening, vertical rods passing through the boX orsupport at opposite sides of the open-

